Projector

Abstract

A projector includes a solid-state light source, a diffuser member, an excitation light source, a phosphor, a light modulator, a projection system, a first and a second light blocking members. When the area, viewed in the direction of the optical axis of diffused light, of an opening of the first light blocking member and the area of a portion over which the first light blocking member blocks the diffused light are defined as A1 and A2, respectively; the area, viewed in the direction of the optical axis of fluorescence, of an opening of the second light blocking member and the area of a portion over which the second light blocking member blocks the fluorescence are defined as B1 and B2, respectively, the ratio A2 / A1 is greater than the ratio B2 / B1.

Description

BACKGROUND[0001]1. Technical Field[0002]The present invention relates to a projector.[0003]2. Related Art[0004]There is a known configuration having a diaphragm provided in an illumination system for improvement in contrast. For example, in the projector described in JP-A-2004-361856, a diaphragm is disposed on the light incident side of a light valve and blocks obliquely incident light that lowers the contrast. To display a full-color image, a diaphragm may be provided for each of three light valves for RGB light fluxes.[0005]In a three-panel projector, light outputted from a white light source is divided into three color light fluxes or RGB light fluxes, which are then guided to three light valves for the RGB light fluxes. When a diaphragm is disposed on the light incident side of each of the light valves, it is preferable that the sizes of the diaphragms are set to be equal to one another so that the white balance does not deteriorate.[0006]On the other hand, a projector using a ...

AI Technical Summary

Benefits of technology

This configuration effectively blocks the skirt portions of diffused and fluorescence light, maintaining the white balance of the projected image and allowing for adjustable luminance and contrast.

Problems solved by technology

However, the present inventor has conducted a study and found that setting the sizes of the RGB diaphragms to be equal to one another as in a typical three-panel projector undesirably results in a bluish displayed image and the white balance greatly deteriorates.

In the light source unit using a solid-state light source and a diffuser member, the diffuser member diffuses light, but high directivity of the light from the solid-state light source cannot be completely eliminated and light having a certain high degree of directivity is outputted.

In this case, it is difficult to effectively block the diffused light.

In this case, it is difficult to effectively block the fluorescence.

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